
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:25 AM
micromass

1 
32,584 
This might be embarrasingly easy or impossible; I've been a computer programmer for too long since my statistics...

Jul511 02:40 AM
rabbyad

3 
5,833 
Let us assume a dynamic system which has vector with 'n' components (which are nonnegative integers from 1>n) at...

Jun2911 09:31 PM
Stephen Tashi

1 
1,273 
Hi guys,
I'm working on a research project that looks at the amount of cosmic rays coming out of a particular...

Jul111 09:37 AM
Stephen Tashi

1 
1,078 
I have a state transition probability matrix and a state probability vector
& respectively.
Now, I want to...

Jul111 09:23 PM
lemontree45

6 
2,192 
Let's say you have a random sample of 5 values that are drawn from an exponential distribution with a mean of 8.
...

Jul411 07:14 PM
bpet

6 
8,234 
In proving :x=0\Longrightarrow x=0,the following indirect proof is offered:
Let x= 0 and suppose x\neq 0...

Jul511 04:05 PM
daveb

14 
2,052 
Hello,
While doing a research, I obtained the following PDF:
...

Jun2811 01:56 PM
Pyrrhus

16 
4,227 
I'm studying for the probability actuarial exam and I came across a problem involving transformations of random...

Jul311 09:39 PM
bpet

1 
2,021 
I'd like to know how to prove (or show that it is reasonable) that the probability that a random vector (X, Y) assumes...

Jul411 07:40 PM
ndrue

12 
1,878 
If all the exams have normal distribution will the average grades to student also be normal distributed?
I have...

Jul1111 08:45 AM
MaxManus

4 
1,633 
is there a way to explicitly express the chisquared inverse function?
when programming it, I have had to resort to...

Jun2911 06:53 PM
onanox

12 
5,509 
I'm going through the set theory material in the appendix of Knapp's Basic Algebra. I want to make sure that I...

Jul511 04:43 PM
TopCat

6 
2,502 
Hello everyone,
I have a (noob!) question about Markov Random Field potential function.
So, I am looking at some...

Jun2811 05:18 PM
pamparana

0 
729 
Definition: Let X1,X2,... be a sequence of random variables defined on a sample space S. We say that Xn converges to a...

Jul211 12:28 AM
kingwinner

6 
1,864 
hey guys, i am really confused on something.here is the thing:
i have;
i=x+(x^2y)^(1/2)
and here x is...

Jul311 01:54 PM
musademirtas

4 
1,464 
Hi everyone,
I was wondering if anyone could help me better understand dependent probabilities. I am interested in...

Jun2911 11:41 PM
Stephen Tashi

3 
2,509 
Hello experts,
Thanks to discussions with Stephen Tashi for getting me this far.
See the problem statement in...

Jul111 08:36 AM
tim8691

4 
1,505 
Hi all,
The question is: Given that X follows a geometric distribution, prove that
...

Jul211 09:20 PM
Ant64

2 
1,532 
If p(x) is a probability distribution on the real number line, the "wrapped" distribution around the unit circle is:...

Jul311 09:27 PM
bpet

1 
1,555 
Hi everyone!
Here's my problem of the day:
Let's take a box containing 3 identical (but distinguishable)...

Jul311 02:34 PM
teddd

1 
845 
Today my grandfather told me a story, which he insists is true and which I believe he believes is true, which seems to...

Jul811 01:37 PM
Megaritz

6 
2,215 
My goal here is to at least approximately calculate the probability density function (PDF) given the moment generating...

Jul711 07:28 PM
bpet

6 
6,055 
The following problem came up in my work.
You have a tube, open at the top. Raindrops fall into the mouth of the...

Jul911 08:17 AM
pmsrw3

9 
1,958 
I have a discrete set of data. I'd like to visualize it probabilistically. Unfortunately, I focused in Num Methods in...

Jul611 11:14 AM
pmsrw3

2 
1,548 
Hi,
Why there is a half factor in the definition of the correlation of complex random variables, like:
...

Jul611 01:14 PM
S_David

4 
2,842 
Hi, it will be a very silly question, excuse me plz.
I am wondering whether
3/(sqrt(2pi delta^2))...

Jul1111 08:07 AM
wall_e

4 
2,524 
Dear all,
let's say I want to know the elasticity constant of a spring (k), so I measure several times different...

Jul811 01:10 PM
atat1tata

8 
2,476 
Hi there! I'm trying to prove that every Dedekind cut A has an additive inverse A such that A + (A)=0*. We've...

Jul711 08:51 AM
micromass

1 
1,649 
I have 6 years of data which has both a 3month and a 12month seasonality, it exhibits a trend and is very noisy.
...

Jul711 12:17 AM
Oxymoron

0 
716 
Hi, everybody
Let n_1 ~ Poisson ( \lambda_1 ) and n_2 ~ Poisson (\lambda_2).
Now define n=n_1n_2 . We...

Jul811 03:47 AM
sabbagh80

5 
1,958 
Hello,
I have a question regarding the likelihood ratio order of two distributions:
Is there a requirement that...

Jul711 05:16 PM
hadron23

0 
862 
Theorem: If "θ hat" is an unbiased estimator for θ AND Var(θ hat)>0 as n>∞, then it is a consistent estimator of θ....

Jul811 04:28 PM
kingwinner

4 
2,262 
Linear Spaces
Norms and inner products
Holder’s inequality
Minkowski’s inequality
Normed linear spaces...

Jul811 10:00 AM
micromass

1 
1,138 
suppose i have 2 bayesian networks....
a>b and c>d ie b depends on a and d depends on b
now...

Jul1011 05:41 PM
SW VandeCarr

3 
1,210 
The ABC manufacturing company purchases a certain part from two suppliers (A supplier & B supplier). The parts...

Jul911 12:23 PM
pmsrw3

8 
1,579 
Olbers' paradox states that if the universe is infinite, static and homogeneous then why is the night sky dark. Of...

Jul911 08:35 PM
pmsrw3

3 
1,823 
Hello y'all,
If I have n data points (xi, yi) each with error bars in both x and y (xi_err, yi_err), should I use...

Jul911 04:52 PM
pmsrw3

6 
2,922 
I believe that it is correct, and it concisely represents a concept I have never understood. It seems obvious to me...

Jul911 07:40 PM
pmsrw3

3 
1,185 
In a box with 80 tickets, 10 people buy 10 tickets each. If there are 4 winning tickets drawn at random find the...

Jul1011 05:40 AM
tinytim

1 
1,060 
Hi there,
I am thinking a question of finding the expectation of duplicate numbers (how many time any pair could be...

Jul1011 07:35 PM
bpet

1 
797 